Cleaning brush



FIG. 1 is a perspective view, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a plan view from above thereof; and,

FIG. 7 is a plan view from below thereof.

The broken lines shown in the drawings are for the purpose of illustrating portions of the cleaning brush and form no part of the claimed design. 

The ornamental design for the a cleaning brush, as shown and described. 